Active development of the digital economy influences all market agents, including consumers. Moreover, consumers become a driving force behind adoption of technology in their economic activities. They learn through this adoption process, developing both objective and subjective knowledge components. As an outcome, consumers’ satisfaction, trust, value and overall perception of a win-win nature of economic interaction are affected, influencing consumer performance, e.g. causing innate dissatisfaction or stimulating inferences of manipulative intent. Current conceptual paper addresses and critically revises existing research on measuring consumer digital activities, decomposing existing indices and screening them for consumer knowledge components. Most of the indices are biased towards objective consumer knowledge, while the large body of consumer research on the relevance of subjective components, associated, for example, with the overall marketplace perception, persuasion knowledge and skepticism are omitted and thus represent potential contribution to strengthening our understanding of the knowledge perspective of consumer digital performance.